XGY   Grimsby Mountain, ON Weather Observed At   43-11  N    79-34  W

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2026-04-18	7:30pm			Max		Min
Weather		----
Temperature		13.5 °C		25.0 °C	12:21pm	4.3 °C	5:31am
Relative Humidity		87 %		96 %	7:37am	45 %	12:10pm
Dew Point		11.4 °C		16.1 °C	2:28pm	3.3 °C	5:26am
Wind Velocity		11 ° at  2.6 G 10.4 kt		20.0 kt	1:39pm
Pressure		29.709 "  ↑		29.915 "	12:30am	29.608 "	12:51pm
Rainfall Rate		0.0 mm/h		27.4 mm/h	4:01pm
Snow On Ground		0 cm
Brightness / Darkness		7 W/m² /  0.00 m/"²		858 W/m²	12:18pm	19.87 m/"²	3:35am
Remarks

Rainfall	Today	4.2 mm	Storm Total	4.0 mm
Snowfall	Today	0.0 cm	Storm Total	0.0 cm

Evapotranspiration

Today

-2.24 mm

Lake Conditions

Water Temperature  --- °C

Waves  ---

ICE FREE

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Meteor Index	18   Showers
Aurora Index / Solar	45   Active   + 4 nT	Solar Flux   106  sfu  /   S 0    G 2    R 0   /  MUF   22.5 MHz

Sunrise	6:30am	Sunset	8:05pm
Moonrise	N/A	Moonset	N/A	Moon Phase	New Moon

Grimsby Mountain Weather Maps
Local	Regional	Area	Synoptic
updated H+09 and every 10m	updated H+19 and H+49	updated H+19

Ontario 6-Hour Meteorological Summary

Canadian 6-Hour Meteorological Summaries

CLIMAT Data
Official	Yesterday					2004	2005	2006	2007	2008	2009	Normals & Records
		2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
		2020	2021	2022	2023	2024	2025	2026

Grimsby Mountain Charts

	Sky Quality (Darkness) Meter courtesy of

              

Wx Map	Sat Pix	IR Sat Pix	Radar	Lightning
	Water	Ice

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  This is a privately operated weather station that is part of the Meteorological Service of Canada's official observing network.
Permission to publish the weather statistics found on this website is not required.
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